What are the solutions of the equation 3x^2 +13x=10 ?

Answer:

3/8

Step-by-step explanation:

Answer:

r = 4units

Step-by-step explanation:

The standard foem of equation of a line is expressed as;

(x-a)² + (y-b)² = r²

r is the radius

Compare with the given equation (x - 2)^2 + (y + 1)^2 = 16

r² = 16

r = √16

r = 4

Hence the radius of the circle is 4

Complete question is;

Elena would like to know the average height of seventh graders in her school district. She measures the heights of everyone in a random sample of 20 students. The mean height of Elena's sample is 61 inches, and the MAD (mean absolute deviation) is 2 inches.

Select all the true statements. Make your selections bold.

A. The median height of the sample must be between 59 and 63 inches.

B. Another random sample of 20 students is likely to have a mean between 57 and 65 inches.

C. The mean height of these 20 students is likely to be the same as the mean height of all students in the district.

D. The mean height of these 20 students is likely to be the same as the mean height of a second random sample of 20 students.

E. Elena would be more likely to get an accurate estimate of the mean height of the population by sampling 40 people instead of sampling 20 people.

Answer:

Options A, B & E are true.

Step-by-step explanation:

We are told that Elena's mean absolute deviation is 2 inches.

This means that the distance between each data point and the mean is equal to 2. This value gives us a good idea about the variability present in the dataset.

This is calculated from the difference between the mean of the absolute value of the initial mean and each data set.

Now, looking at the options. In option A, since mean height of the 20 students is given as 61, it means the median will be close to that figure too. Thus, between 59 and 63 inches given is appropriate.

In option B, if another random sample is taken, the mean would likely be close to 61 too since the MAD is 2.

Thus range given is okay.

In options C & D, there is no evidence to prove that the new mean would be the same as the district or the second random sample. This, both options are not appropriate.

In option E, if she uses a Sample of 40, she will obviously get a more accurate figure because the more the sample the more accurate the average result that represents the population.

Answer:

Probability of selecting a legislator who favors rising sales tax is 0.63

Step-by-step explanation:

Given

Percentage of legislators that are democrats = 0.35

Percentage of legislators that are Republicans = 0.70

All the democrats favor raise in sales tax , so their probability is 1

and only 40% of the Republicans favor raise in sales tax.

Probability of selecting a legislator who favors rising sales tax is

(0.35*1)+(0.70*0.40)

= 0.63

Answer:

C

Step-by-step explanation:

It is negative.

Answer:

d

Step-by-step explanation:

Answer:

60.57

Step-by-step explanation:

The angle L can be found using the inverse sine function.

L=arcsin(opp/hyp )

L=arcsin(2.7/3.1)

L =60.57129282

Answer:

volume = 108

Step-by-step explanation:

simple: volume = base x height

9 x 12 = 108

Answer 1452

Step-by-step explanation:

im not sure if im correct but the formua is V  = L x W x H which is volume equal lenth multiplied by with multiplied by height. so 12 x 11 x 11

Answer:

D

Step-by-step explanation:

D. 60 Units

The surface area of the right cone is,

⇒ SA = 60π units²

The multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.

We have to given that;

Radius of cone (r) = 5 units

Slant height of cone (l) = 7 units

Now, We know that;

The formula that is used to calculate the surface area of a cone is;

⇒ SA = πrl + πr²

Hence, We can substitute all the values we get;

⇒ SA = πrl + πr²

⇒ SA = π × 5 × 7 + π × (5)²

⇒ SA = 35π + 25π

⇒ SA = 60π units²

Thus, The surface area of the right cone is,

⇒ SA = 60π units²

Learn more about the multiplication visit:

brainly.com/question/10873737

#SPJ7

Answ

90

Step-by-step explanation:

because you have add 90 for all of them

Answer:

The answer is "Experimental Probability  ".

Step-by-step explanation:

The probability of experiments is uncertainty which is calculated several times as per the outcome of even an experiment. The probability distribution is probably dependent upon reasoning. This probability is a price of about one or zero. It was based on the relative frequency or what occurs during a probability test.

Answer:

7/20, that's what my calculator says, hope this helps

Step-by-step explanation:

Answer:

polygon is regular. Round answer to the nearest tenth

Step-by-step explanation:

Answer:

The answer is C

Step-by-step explanation:

Answer and Step-by-step explanation:

The area formula for a Circle is:

A = [tex]\pi r^2[/tex]

Diameter is equal to the radius times 2.

So, divide the diameter to get the radius.

6 divided by 2 equals 3.

Now, plug it into the formula.

[tex]A = \pi (3)^{2}[/tex]

A = [tex]9\pi[/tex]

Plug this into your calculator by multiplying 9 by pi.

We get the answer to be 28.3 when rounded to the nearest tenth.

#teamtrees #PAW (Plant And Water)

Answer:

The rectangle

which should be the second option

Answer:

option #2 : rectangular

Step-by-step explanation:

option #2 : rectangular, with:

the length = diagonal of cube face

the width = cube edge

Answer:

y = 66

Step-by-step explanation:

Exterior angles thm:

y + y - 31 = y + 35

2y - 31 = y + 35

2y - y = 35 + 31

y = 66

Answer:

w=(-5t)+20,000

Step-by-step explanation:

Answer:

gay is bad

Step-by-step explanation:

Answer:

your answer is 5/6

:)

Answer:

the radius is half of the cricle

Given:

Angle A = 18.6°

Angle B = 93°

Length of side AB = 646 meters

To find:

the distance across the river, distance between BC

Steps:

Since we know the measure of 2 angles of a triangle we can find the measure of the third angle.

18.6° + 93° + ∠C = 180°

        111.6° + ∠C = 180°

                    ∠C = 180° - 111.6°

                    ∠C = 68.4°

Therefore the measure of angle C is 68.4°.

now we can use the law of Sines,

[tex]\frac{BC}{sinA}=\frac{AB}{SinC}[/tex]

[tex]\frac{BC}{sin(18.6)}= \frac{646}{sin(68.4)}[/tex]

[tex]BC[sin(68.4)] = 646 [sin(18.6)][/tex]

[tex]BC = \frac{646*sin(18.6)}{sin(68.4)}[/tex]

[tex]BC = \frac{646 * 0.3190}{0.9298}[/tex]

[tex]BC = 221.63[/tex]

[tex]BC = 222[/tex] meters

Therefore, the distance across the river is 222 meters.

Happy to help :)

If anyone need more help, feel free to ask

Answer:

35/12

Step-by-step explanation:

Opposite/Adjcent (of C)

35/12

Answer: plot the y intercept at 5 on the y axis. Then from (0,5) count down 3 and to the right 4 to plot the next point at (4,2). Then kee doing that until you have enough pony’s to connect as a line.

Step-by-step explanation:

Answer:

13sqrt(2)

Step-by-step explanation:

Using pythagoras theorem

Answer:

0.00038.

Step-by-step explanation:

The exponent is negative 4 so the 3 goes into the 4th place after the decimal point.

Answer:

4

Step-by-step explanation:

I think that is the answer

Answer: x=43, y=180

Step-by-step explanation: x is 43 because the 43 next to it has the same value. y is 180 because the angle is a straight line.

Answer: part A : 900

Part B 38